<!DOCTYPE html>
<html>
<head>
<title>Check that content settings apply to the correct frame</title>
</head>
<body>
  <script>
    var frame = document.createElement("iframe");
    frame.src = "http://www.a.com:" + location.port +
        "/popup_blocker/popup-frames-iframe.html";
    document.body.appendChild(frame);
  </script>
</body>
</html>